body, html {
  height: 100%;
  min-height: 80vh;
}

body {
  --bs-body-bg: #f4f4f4;
}

div {
  border-radius: 8px;
}

body > .container {
  background-color: white;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  max-width: 900px;
  --bs-gutter-x: 30px !important;
}

.row {  
  --bs-gutter-x: 30px !important;
}

.item {
  background-color: var(--bs-primary);
  color: var(--bs-white);
  height: 100%;
  text-align: center;
}

.instructor .photo {
  display: inline-block;
  max-width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
}

.registration {
  position: sticky;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: #333;
  text-align: center;
  border-radius: 0px;
}